Letter, from Henry Oldenburg to Robert Boyle, dated at London Concerning delivery of 'Thermometrical discourse'; concerning a revived musical instrument called 'archiviole' 'comprehending both an organ and a concert of 5 or 6 viols in one'; concerning whaling off Bermuda; states that Cassini's observations with Saturn, made with Campani's telescope, will be sent; concerning the truce between the Empire and the Turks 13 October 1664